main div {
    padding: 2%;
}

main #photos {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;

    position: sticky;
    top: 0;

    height: 80vh;

    background: #eee;
}

main #bio {
    background: #bbb;
}

#photos img {
    position: relative;
    width: 8em;
    min-width: 7vw;
    max-width: 12vw;
    height: 38vh;
    object-fit: cover;
    object-position: center;
    border-color: #ddd;
    border-width: 1vh;
    border-style: solid;
    border-radius: 2vw;
    filter: grayscale(1);
    transition: filter 1s;
}

#photos img:hover {
    filter: none;
}

#photos img:nth-of-type(2) {
    top: 2.8vw;
    left: -2.8vw;
}

#photos img:nth-of-type(3) {
    top: -1.8vw;
    left: 2.8vw;
}

#photos img:nth-of-type(4) {
    top: 1.0vw;
}